| // |
| // Copyright 2012 The ANGLE Project Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| // |
| |
| // IndexBuffer11.cpp: Defines the D3D11 IndexBuffer implementation. |
| |
| #include "libANGLE/renderer/d3d/d3d11/IndexBuffer11.h" |
| |
| #include "libANGLE/Context.h" |
| #include "libANGLE/renderer/d3d/d3d11/Context11.h" |
| #include "libANGLE/renderer/d3d/d3d11/Renderer11.h" |
| #include "libANGLE/renderer/d3d/d3d11/renderer11_utils.h" |
| |
| namespace rx |
| { |
| |
| IndexBuffer11::IndexBuffer11(Renderer11 *const renderer) |
| : mRenderer(renderer), |
| mBuffer(), |
| mBufferSize(0), |
| mIndexType(gl::DrawElementsType::InvalidEnum), |
| mDynamicUsage(false) |
| {} |
| |
| IndexBuffer11::~IndexBuffer11() {} |
| |
| angle::Result IndexBuffer11::initialize(const gl::Context *context, |
| unsigned int bufferSize, |
| gl::DrawElementsType indexType, |
| bool dynamic) |
| { |
| mBuffer.reset(); |
| |
| updateSerial(); |
| |
| if (bufferSize > 0) |
| { |
| D3D11_BUFFER_DESC bufferDesc; |
| bufferDesc.ByteWidth = bufferSize; |
| bufferDesc.Usage = D3D11_USAGE_DYNAMIC; |
| bufferDesc.BindFlags = D3D11_BIND_INDEX_BUFFER; |
| bufferDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE; |
| bufferDesc.MiscFlags = 0; |
| bufferDesc.StructureByteStride = 0; |
| |
| ANGLE_TRY(mRenderer->allocateResource(GetImplAs<Context11>(context), bufferDesc, &mBuffer)); |
| |
| if (dynamic) |
| { |
| mBuffer.setDebugName("IndexBuffer11 (dynamic)"); |
| } |
| else |
| { |
| mBuffer.setDebugName("IndexBuffer11 (static)"); |
| } |
| } |
| |
| mBufferSize = bufferSize; |
| mIndexType = indexType; |
| mDynamicUsage = dynamic; |
| |
| return angle::Result::Continue; |
| } |
| |
| angle::Result IndexBuffer11::mapBuffer(const gl::Context *context, |
| unsigned int offset, |
| unsigned int size, |
| void **outMappedMemory) |
| { |
| Context11 *context11 = GetImplAs<Context11>(context); |
| ANGLE_CHECK_HR(context11, mBuffer.valid(), "Internal index buffer is not initialized.", |
| E_OUTOFMEMORY); |
| |
| // Check for integer overflows and out-out-bounds map requests |
| bool outOfBounds = (offset + size < offset || offset + size > mBufferSize); |
| ANGLE_CHECK_HR(context11, !outOfBounds, "Index buffer map range is not inside the buffer.", |
| E_OUTOFMEMORY); |
| |
| D3D11_MAPPED_SUBRESOURCE mappedResource; |
| ANGLE_TRY(mRenderer->mapResource(context, mBuffer.get(), 0, D3D11_MAP_WRITE_NO_OVERWRITE, 0, |
| &mappedResource)); |
| |
| *outMappedMemory = static_cast<char *>(mappedResource.pData) + offset; |
| return angle::Result::Continue; |
| } |
| |
| angle::Result IndexBuffer11::unmapBuffer(const gl::Context *context) |
| { |
| Context11 *context11 = GetImplAs<Context11>(context); |
| ANGLE_CHECK_HR(context11, mBuffer.valid(), "Internal index buffer is not initialized.", |
| E_OUTOFMEMORY); |
| |
| ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext(); |
| dxContext->Unmap(mBuffer.get(), 0); |
| return angle::Result::Continue; |
| } |
| |
| gl::DrawElementsType IndexBuffer11::getIndexType() const |
| { |
| return mIndexType; |
| } |
| |
| unsigned int IndexBuffer11::getBufferSize() const |
| { |
| return mBufferSize; |
| } |
| |
| angle::Result IndexBuffer11::setSize(const gl::Context *context, |
| unsigned int bufferSize, |
| gl::DrawElementsType indexType) |
| { |
| if (bufferSize > mBufferSize || indexType != mIndexType) |
| { |
| return initialize(context, bufferSize, indexType, mDynamicUsage); |
| } |
| |
| return angle::Result::Continue; |
| } |
| |
| angle::Result IndexBuffer11::discard(const gl::Context *context) |
| { |
| Context11 *context11 = GetImplAs<Context11>(context); |
| ANGLE_CHECK_HR(context11, mBuffer.valid(), "Internal index buffer is not initialized.", |
| E_OUTOFMEMORY); |
| |
| ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext(); |
| |
| D3D11_MAPPED_SUBRESOURCE mappedResource; |
| ANGLE_TRY(mRenderer->mapResource(context, mBuffer.get(), 0, D3D11_MAP_WRITE_DISCARD, 0, |
| &mappedResource)); |
| |
| dxContext->Unmap(mBuffer.get(), 0); |
| |
| return angle::Result::Continue; |
| } |
| |
| DXGI_FORMAT IndexBuffer11::getIndexFormat() const |
| { |
| switch (mIndexType) |
| { |
| case gl::DrawElementsType::UnsignedByte: |
| return DXGI_FORMAT_R16_UINT; |
| case gl::DrawElementsType::UnsignedShort: |
| return DXGI_FORMAT_R16_UINT; |
| case gl::DrawElementsType::UnsignedInt: |
| return DXGI_FORMAT_R32_UINT; |
| default: |
| UNREACHABLE(); |
| return DXGI_FORMAT_UNKNOWN; |
| } |
| } |
| |
| const d3d11::Buffer &IndexBuffer11::getBuffer() const |
| { |
| return mBuffer; |
| } |
| |
| } // namespace rx |